EP2392200A1 - Printed circuit assembly - Google Patents

Printed circuit assembly

Info

Publication number
EP2392200A1
EP2392200A1 EP10704613A EP10704613A EP2392200A1 EP 2392200 A1 EP2392200 A1 EP 2392200A1 EP 10704613 A EP10704613 A EP 10704613A EP 10704613 A EP10704613 A EP 10704613A EP 2392200 A1 EP2392200 A1 EP 2392200A1
Authority
EP
European Patent Office
Prior art keywords
printed circuit
base
electrical
contacts
substrate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10704613A
Other languages
German (de)
English (en)
French (fr)
Inventor
Dalibor J. Smejtek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TE Connectivity Corp
Original Assignee
Tyco Electronics Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tyco Electronics Corp filed Critical Tyco Electronics Corp
Publication of EP2392200A1 publication Critical patent/EP2392200A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/36—Assembling printed circuits with other printed circuits
    • H05K3/366—Assembling printed circuits with other printed circuits substantially perpendicularly to each other
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/14—Structural association of two or more printed circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/36—Assembling printed circuits with other printed circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/11—Printed elements for providing electric connections to or between printed circuits
    • H05K1/117—Pads along the edge of rigid circuit boards, e.g. for pluggable connectors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/04—Assemblies of printed circuits
    • H05K2201/048—Second PCB mounted on first PCB by inserting in window or holes of the first PCB
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09—Shape and layout
    • H05K2201/09009—Substrate related
    • H05K2201/09036—Recesses or grooves in insulating substrate
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09—Shape and layout
    • H05K2201/09209—Shape and layout details of conductors
    • H05K2201/09654—Shape and layout details of conductors covering at least two types of conductors provided for in H05K2201/09218 - H05K2201/095
    • H05K2201/09809—Coaxial layout
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10227—Other objects, e.g. metallic pieces
    • H05K2201/10356—Cables
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10431—Details of mounted components
    • H05K2201/10439—Position of a single component
    • H05K2201/10484—Obliquely mounted
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
    • H05K3/3405—Edge mounted components, e.g. terminals

Definitions

  • the subject matter described and/or illustrated herein relates generally to printed circuits, and, more particularly, to electrically connecting printed circuits together.
  • Some electrical systems include a relatively high number of ground and/or signal paths between electrical components of the system. For example, hundreds or thousands of ground and/or signal paths may be routed between electrical components of the system. Because of the ever increasing demand on individual electrical components, and the system overall, to accommodate more signal and/or ground paths, it may be desirable to increase the density of electrical contacts at interconnection points between the electrical components of the system. For example, it may be desirable to increase the density of electrical contacts where two or more printed circuits are electrically interconnected. Moreover, increased density may be desirable at locations within the system where a relatively high number of signal and/or ground paths are routed to a relatively compact component, such as a cable that may include a bundle of a plurality of smaller electrical leads and/or coaxial cables. For example, a smaller printed circuit that terminates a plurality of coaxial cables may have a relatively high density of electrical contacts for receiving a relatively high number of signal and/or ground paths from a larger printed circuit of the system.
  • printed circuits are electrically connected together using one or more intervening electrical connector assemblies.
  • one of the printed circuits may include an electrical connector assembly that mates with electrical contacts on the secondary printed circuit.
  • both printed circuits include electrical connector assemblies that mate with each other.
  • Each electrical connector assembly typically includes a housing that holds a plurality of mating contacts. Each mating contact is electrically connected to one or more corresponding electrical contacts of the printed circuit on which the electrical connector assembly is mounted.
  • the mating contacts of the electrical connector assemblies directly engage either the electrical contacts on the secondary printed circuit or the mating contacts of the electrical connector assembly of the secondary printed circuit. As described above, it may be desirable to increase the density of the electrical contacts of the printed circuits where they interconnect.
  • increasing the density of the electrical contacts of the printed circuit may require increasing the density of the mating contacts of the electrical connector assembl(ies).
  • Increasing the density of the mating contacts of the electrical connector assembl(ies) may decrease the signal integrity of the electrical connection between the printed circuits.
  • a printed circuit assembly includes a base printed circuit having a printed circuit receiving area and a plurality of electrical contacts provided on the printed circuit receiving area.
  • the printed circuit assembly also includes a secondary printed circuit having a secondary substrate including a mating edge and a plurality of secondary contacts provided along the mating edge.
  • the secondary printed circuit is mounted on the base printed circuit such that the mating edge of the secondary printed circuit is directly engaged with the base printed circuit at the printed circuit receiving area.
  • Each of the secondary contacts is electrically connected to a corresponding one of the electrical contacts of the base printed circuit.
  • the secondary printed circuit includes a cable-receiving edge configured to receive a plurality of coaxial cables, and the secondary substrate of the secondary printed circuit has a plurality of secondary traces that are each electrically connected to a corresponding one of the secondary contacts, wherein each of the plurality of coaxial cables is terminated to a corresponding one of the secondary traces.
  • the printed circuit receiving area of the base printed circuit optionally includes a slot and the mating edge of the secondary printed circuit is optionally received within the slot. At least one electrical contact of the base printed circuit is optionally electrically connected to the corresponding secondary contact of the secondary printed circuit via an electrical bonding material. At least one electrical contact of the base printed circuit is optionally directly engaged with the corresponding secondary contact of the secondary printed circuit.
  • At least one electrical contact of the base printed circuit optionally extends on an exterior surface of the base printed circuit.
  • at least one secondary contact of the secondary printed circuit optionally extends on an exterior surface of the secondary printed circuit.
  • the secondary printed circuit extends at an approximately non-parallel angle relative to the base printed circuit. In some embodiments, the secondary printed circuit extends approximately perpendicular relative to the base printed circuit.
  • at least one electrical contact of the base printed circuit includes an electrically conductive pad.
  • at least one secondary contact of the secondary printed circuit includes an electrically conductive pad.
  • a printed circuit assembly in another embodiment, includes a base printed circuit having a printed circuit receiving area and a plurality of electrical contacts provided on the printed circuit receiving area.
  • the printed circuit assembly also includes a plurality of secondary printed circuits.
  • Each of the secondary printed circuits has a secondary substrate including a mating edge and a plurality of secondary contacts provided along the mating edge.
  • Each of the secondary printed circuits is mounted on the base printed circuit such that the secondary substrate of each secondary printed circuit is directly engaged with the base printed circuit at the printed circuit receiving area of the base printed circuit.
  • Each of the secondary contacts is electrically connected to a corresponding one of the electrical contacts of the base printed circuit.
  • each secondary printed circuit includes a cable-receiving edge configured to receive a plurality of coaxial cables, and the secondary substrate of each secondary printed circuit has a plurality of secondary traces that are each electrically connected to a corresponding one of the secondary contacts, wherein each of the plurality of coaxial cables is terminated to a corresponding one of the secondary traces.
  • the printed circuit receiving area of the base printed circuit includes a plurality of slots and the mating edge of each of the secondary printed circuits is received within a corresponding one of the slots. At least one of the plurality of electrical contacts of the base printed circuit is optionally electrically connected to the corresponding secondary contact of the corresponding secondary printed circuit via an electrical bonding material.
  • At least one of the plurality of electrical contacts of the base printed circuit is optionally directly engaged with the corresponding secondary contact of the corresponding secondary printed circuit. At least one of the plurality of electrical contacts of the base printed circuit optionally extends on an exterior surface of the base printed circuit. At least one secondary contact of at least one of the secondary printed circuits optionally extends on an exterior surface of the corresponding secondary printed circuit. Optionally, at least one of the secondary printed circuits extends at an approximately non-parallel angle relative to the base printed circuit. Optionally, at least one of the secondary printed circuits extends approximately perpendicular relative to the base printed circuit. The secondary printed circuits optionally include two printed circuits that extend approximately parallel relative to each other. Optionally, the secondary printed circuits include two printed circuits that include different thicknesses and/or extend different heights.
  • a printed circuit assembly in another embodiment, includes a base printed circuit having a printed circuit receiving area and a plurality of electrical contacts provided on the printed circuit receiving area.
  • the printed circuit assembly also includes a secondary printed circuit having a secondary substrate including a plurality of secondary contacts.
  • the secondary printed circuit is mounted on the base printed circuit at the printed circuit receiving area of the base printed circuit.
  • Each of the secondary contacts of the secondary printed circuit is electrically connected to a corresponding one of the electrical contacts of the base printed circuit via an electrical bonding material.
  • Figure 1 is a perspective view of an exemplary embodiment of a printed circuit assembly.
  • Figure 2 is a perspective view of an exemplary embodiment of a base printed circuit of the printed circuit assembly shown in Figure 1.
  • Figure 3 is a top plan view of the base printed circuit shown in Figure 2.
  • Figure 4 is a bottom plan view of the base printed circuit shown in Figures 2 and 3.
  • Figure 5 is a cross-sectional view of base printed circuit shown in Figures 2-4 taken along line 5-5 of Figure 3.
  • Figure 6 is an enlarged cross-sectional view of a portion of the cross-section of the base printed circuit shown in Figure 5.
  • Figure 7 is an elevational view of an exemplary embodiment of a secondary printed circuit of the printed circuit assembly shown in Figure 1.
  • Figure 8 is a perspective view of the secondary printed circuit shown in Figure 7 illustrating the secondary printed circuit terminating the end of an exemplary cable.
  • Figure 9 is an enlarged perspective view of a portion of the printed circuit assembly shown in Figure 1.
  • Figure 10 is an elevational view of an exemplary alternative embodiment of a printed circuit assembly.
  • Figure 11 is a perspective view of another exemplary alternative embodiment of a printed circuit assembly.
  • Figure 12 is a perspective view of another exemplary alternative embodiment of a printed circuit assembly.
  • Figure 13 is an elevational view of another exemplary alternative embodiment of a printed circuit assembly.
  • FIG 1 is a perspective view of an exemplary embodiment of a printed circuit assembly 10.
  • the printed circuit assembly 10 includes a base printed circuit 12 and a plurality of secondary printed circuits 14.
  • Each of the secondary printed circuits 14 is mounted on the base printed circuit 12 such that the secondary printed circuit 14 is electrically connected to the base printed circuit 12.
  • Electrical connection between the base printed circuit 12 and each of the secondary printed circuits 14 enables the transmission of electrical signals, electrical ground, and/or electrical power between electrical devices (not shown).
  • Each of the electrical devices may be electrically connected to the base printed circuit 12 or one or more of the secondary printed circuits 14, or the base printed circuit 12 or one or more of the secondary printed circuits 14 may be a component of one or more of the electrical devices.
  • each of the secondary printed circuits 14 is mounted on, including being electrically connected to, the base printed circuit 12 without the use of an intervening electrical connector assembly (not shown).
  • the term "printed circuit” is intended to mean any electric circuit in which the conducting connections have been printed or otherwise deposited in predetermined patterns on an insulating base.
  • the base printed circuit 12 is shown herein as having six secondary printed circuits 14 mounted thereon in electrical connection therewith, any number of secondary printed circuits 14 may be mounted on the base printed circuit 12 in electrical connection therewith.
  • Each of the electrical devices may be any type of electrical component.
  • the base printed circuit 12 may be referred to herein as a "receiving printed circuit".
  • Figure 2 is a perspective view of an exemplary embodiment of the base printed circuit 12.
  • Figure 3 is a top plan view of the base printed circuit 12.
  • Figure 4 is a bottom plan view of the base printed circuit 12.
  • Figure 5 is a cross-sectional view of base printed circuit 12 taken along line 5-5 of Figure 3.
  • the base printed circuit 12 includes a substrate 16 extending a length L from an end portion 18 to an opposite end portion 20.
  • the substrate 16 includes a pair of opposite sides 22 and 24.
  • Each side 22 and 24 includes a respective exterior surface 26 and 28.
  • the side 22 includes a printed circuit receiving area 29 that, as will be described below, receives the secondary printed circuits 14 ( Figures 1, 7, 8, and 9).
  • each of the exterior surfaces 26 and 28, and thus each side 22 and 24, includes a plurality of electrical contacts 30 and 32, respectively, extending thereon. At least some of the electrical contacts 30 are provided on the printed circuit receiving area 29 of the side 22. Alternatively, only one of the exterior surfaces 26 and 28, and thus only one of the sides 22 and 24, includes the respective electrical contacts 30 and 32 thereon. In the exemplary embodiment, the electrical contacts 30 on the side 22 are electrically connected to the electrical contacts 32 on the side 24 via corresponding electrical contacts 34 (only visible in Figures 5 and 6) that extend through the substrate 16 from the corresponding electrical contact 30 to the corresponding electrical contact 32.
  • the substrate 16 may be a flexible substrate or a rigid substrate.
  • the substrate 16 may be fabricated from and/or include any material(s), such as, but not limited to, ceramic, epoxy-glass, polyimide (such as, but not limited to, Kapton® and/or the like), organic material, plastic, polymer, and/or the like.
  • the substrate 16 is a rigid substrate fabricated from epoxy-glass, such that the base printed circuit 12 is what is sometimes referred to as a "circuit board".
  • the substrate 16 includes only a single layer. Alternatively, the substrate 16 may include any number of layers greater than one layer.
  • the substrate 16 may include two exterior layers that each defines one of the sides 22 and 24, with one or more interior layers sandwiched between the exterior layers.
  • Each interior layer of the substrate 16 may include electrical contacts (not shown) and/or electrical traces (not shown) thereon.
  • the electrical contacts and/or electrical traces on interior layers of the substrate 16 may electrically connect some or all of the electrical contacts 30 on the side 22 with the corresponding electrical contacts 32 on the side 24.
  • the electrical contacts and/or electrical traces on interior layers of the substrate 16 may electrically connect some or all of the electrical contacts 30 and/or 32 to any other location on or within the substrate 16 (such as, but not limited to, any location on any layer, including the same layer, of the substrate 16).
  • the exterior surface 26, and thus the side 22, may include one or more electrical traces (not shown) that electrically connects two or more of the electrical contacts 30 together and/or that electrically connects one or more of the electrical contacts 30 to another location on or within the substrate 16 (such as, but not limited to, any location on any layer, including the same layer, of the substrate 16).
  • the exterior surface 28, and thus the side 24, may include one or more electrical traces (not shown) that electrically connects two or more of the electrical contacts 32 together and/or that electrically connects one or more of the electrical contacts 32 to another location on or within the substrate 16 (such as, but not limited to, any location on any layer, including the same layer, of the substrate 16).
  • one or more layers of the substrate 16 is optionally a ground plane.
  • the substrate 16 may include one or more electrical components (not shown) thereon.
  • Each of the electrical components may be active or passive. Examples of active electrical components include, but are not limited to, processors, amplifiers, and/or the like. Examples of passive electrical components include, but are not limited to, resistors, capacitors, inductors, diodes, and/or the like.
  • Each of the electrical components may be electrically connected to one or more of the electrical contacts 30, the electrical contacts 32, and/or any electrical traces of the substrate 16.
  • Each of the electrical contacts 30 and 32 may conduct electrical signals, electrical ground, and/or electrical power.
  • the pattern of the electrical contacts 30 on the side 22 and the pattern of the electrical contacts 32 on the side 24 are each exemplary only.
  • the electrical contacts 30 may be arranged in any other pattern on the side 22 than is shown and/or described herein.
  • the electrical contacts 32 may be arranged in any other pattern on the side 24 than is shown and/or described herein.
  • the electrical contacts 30 may have any spacing, or pitch, relative to each other, and the electrical contacts 32 may have any spacing, or pitch, relative to each other.
  • the electrical contacts 30 and 32 may each be arranged on the respective side 22 and 24 in any pattern of signal, ground, and/or power contacts.
  • each of the electrical contacts 30 and 32 is an electrically conductive pad
  • each electrical contact 30 and 32 may include any other size, shape, geometry, and/or the like.
  • the electrical contacts 30 and/or 32 are integrally formed with the corresponding electrical contact 34.
  • exterior surfaces of one or more of the electrical contacts 34 that extend along the side 22 define one or more of the corresponding electrical contacts 30 such that such electrical contacts 30 do not extend on the exterior surface 26.
  • exterior surfaces of one or more of the electrical contacts 34 that extend along the side 24 define one or more of the corresponding electrical contacts 32 such that such electrical contacts 32 do not extend on the exterior surface 28.
  • FIG. 6 is a detail view of a portion of the cross-section of the base printed circuit 12 shown in Figure 5.
  • the substrate 16 optionally includes a plurality of slots 36 that extend within the side 22. Specifically, each of the slots 36 extends through the side 22 and into the substrate 16. The slots 36 extend on the printed circuit receiving area 29 of the base printed circuit 12.
  • each slot 36 includes a corresponding row of the electrical contacts 30 adjacent thereto.
  • each slot 36 includes a pair of side walls 37 and 39 that extend a depth D along a central depth axis 38 to a bottom 40.
  • Each slot 36 includes a width W.
  • each slot 36 extends a length Li along the substrate 16 between a pair of opposite end portions 42 and 44. As will be described below, each slot 36 is configured to receive a mating edge 46 ( Figures 1, 7, 8, and 9) of a corresponding one of the secondary printed circuits 14 ( Figures 1, 7, 8, and 9) therein to facilitate mounting the secondary printed circuits 14 on the base printed circuit 12. Although six slots 36 are shown for mounting six secondary printed circuits 14 on the base printed circuit 12, the substrate 16 may include any number of slots 36 for receiving any number of secondary printed circuits 14.
  • each slot 36 may have any depth D for receiving any amount of the corresponding secondary printed circuit 14 therein. In some embodiments, the depth D of one or more slots 36 is different than the depth D of one or more other slots 36. Each slot 36 may also have any width W for receiving a secondary printed circuit 14 having any thickness. In some embodiments, the width W of one or more slots 36 is different than the width W of one or more other slots 36.
  • the central depth axis 38 of each slot 36 extends approximately perpendicular relative to a central plane 48 of the substrate 16.
  • the central depth axis 38 of each slot 36 may extend at any other non- parallel angle relative to the central plane 48.
  • the central depth axis 38 of one or more slots 36 extends at a different angle relative to the central plane 48 of the substrate 16 than the central depth axis 38of one or more other slots 36.
  • each of the slots 36 is equal to the length L of the substrate 16 such that each slot 36 extends completely through both of the end portions 18 and 20. Accordingly, the end portions 42 and 44 of each of the slots 36 are open. The open end portions 42 and/or 44 may facilitate insertion of the secondary printed circuits 14 within the slots 36. Moreover, the open end portions 42 and/or 44 may facilitate mounting secondary printed circuits 14 that have a length L 2 ( Figures 7 and 8) that is greater than the length L of the base printed circuit 12 and/or may facilitate mounting secondary printed circuits 14 in orientations wherein a portion of the secondary printed circuit extends past one of the end portions 18 and 20 of the base printed circuit 12.
  • the open end portions 42 and/or 44 may enable the secondary printed circuits 14 to move within the corresponding slot 36 along the length of the corresponding slot 36 to facilitate aligning secondary contacts 70 ( Figures 1 and 7-9) of the secondary printed circuits 12 with the corresponding electrical contacts 30 of the base printed circuit 12.
  • the end portion 42 and/or 44 of one or more of the slots 36 is closed. Closed end portions 42 and/or 44 may facilitate holding a secondary printed circuit 14 within the corresponding slot 36 during assembly, for example when the base printed circuit 12 is held in an approximately non-horizontal orientation during assembly.
  • Figure 7 is an elevational view of an exemplary embodiment of a secondary printed circuit 14 of the printed circuit assembly 10 ( Figures 1 and 9).
  • Figure 8 is a perspective view of the secondary printed circuit 14 illustrating the secondary printed circuit 14 terminating the end 50 of an exemplary cable 52.
  • the secondary printed circuit 14 includes a substrate 54 extending the length L 2 from an edge 56 to an opposite edge 58 and extending a height H from the mating edge 46 to a cable-receiving edge 60.
  • the substrate 54 includes a thickness T, which is not visible in Figure 7.
  • the substrate 54 includes a pair of opposite sides 62 and 64. Each side 62 and 64 includes a respective exterior surface 66 and 68.
  • only the exterior surface 66, and thus only the side 62, includes a plurality of secondary contacts 70 and a plurality of secondary traces 72 thereon.
  • the secondary contacts 70 extend along the mating edge 46 of the substrate 54.
  • each secondary trace 72 extends from a corresponding one of the secondary contacts 70 generally toward the cable-receiving edge 60 for electrically connecting the secondary contacts 70 to one or more corresponding electrical components.
  • the side 62 also includes a secondary ground contact 73.
  • each of the exterior surfaces 66 and 68, and thus each side 62 and 64 includes a plurality of secondary contacts and/or a plurality of secondary traces extending thereon.
  • each secondary contact 70 is configured to be electrically connected a corresponding electrical contact 30 ( Figures 1-3, 5, and 6) of the base printed circuit 12 ( Figures 1-6) when the secondary printed circuit 14 is mounted on the base printed circuit 12.
  • each secondary printed circuit 14 may include any number of secondary contacts 70 for electrical connection to any number of the electrical contacts 30 of the base printed circuit 12.
  • each secondary printed circuit 14 mounted on the base printed circuit 12 terminates the end 50 of two of the cables 52.
  • the cable- receiving edge 60 of the secondary printed circuit 14 receives the cables 52.
  • Each cable 52 includes a plurality of electrical leads 74.
  • each electrical lead 74 is a coaxial cable.
  • the cable-receiving edge 60 receives each of the electrical leads 74 thereon.
  • Each electrical lead 74 includes an electrical conductor 76 that is electrically connected, or terminated, to a corresponding one of the secondary traces 72. Accordingly, each electrical lead 74 is electrically connected to a corresponding one of the secondary contacts 70.
  • each electrical lead 74 includes an electrical ground conductor 75 that is directly engaged with, and thereby electrically connected to, the secondary ground contact 73 of the secondary printed circuit 114.
  • each secondary printed circuit 14 is shown as terminating the end 50 of two cables 52, each secondary printed circuit 14 mounted on the base printed circuit 12 may terminate any number of cables 52. Moreover, in some embodiments one or more of the electrical leads 74 directly engages the corresponding secondary contact 70 such that the corresponding secondary trace 72 is eliminated. Although each cable 52 is shown as having ten electrical leads 74, each cable 52 may have any number of electrical leads 74. Moreover, in alternative embodiments one or more of the electrical leads 74 is not bundled with other electrical leads 74 in a larger cable, whether or not each electrical lead 74 is a coaxial cable.
  • one or more of the secondary printed circuits 14 mounted on the base printed circuit 12 may be electrically connected to, and/or may form a component of, one or more of any other type of electrical components besides a cable.
  • each of the secondary contacts 70 and each of the secondary traces 72 may conduct electrical signals, electrical ground, and/or electrical power.
  • the pattern of the secondary contacts 70 and the pattern of the secondary traces 72 on the side 62 are each exemplary only.
  • the secondary traces 72 are arranged in a fanned pattern that fans outwardly as the secondary traces extend toward the cable-receiving edge 60.
  • the secondary contacts 70 and the secondary traces 72 may each be arranged in any other pattern on the side 62 than is shown and/or described herein.
  • the secondary contacts 70 may have any spacing, or pitch, relative to each other.
  • each secondary trace 72 may be selected and/or arranged relative to other secondary traces 72 to facilitate optimizing signal integrity (such as, but not limited to, cross-talk, skew, capacitance, and/or the like).
  • adjacent pairs of secondary contacts 70 of one or more of the secondary printed circuits 14 have a different pitch than one or more other adjacent pairs of secondary contacts 70 of the same secondary printed circuit 14.
  • one or more of the adjacent pairs of secondary contacts 70 of one or more secondary printed circuits 14 have a different pitch than one or more adjacent pairs of secondary contacts 70 of one or more other secondary printed circuits 14 mounted on the base printed circuit 12.
  • the substrate 54 may be a flexible substrate or a rigid substrate.
  • the substrate 54 may be fabricated from and/or include any material(s), such as, but not limited to, ceramic, epoxy-glass, polyimide (such as, but not limited to, Kapton® and/or the like), organic material, plastic, polymer, and/or the like.
  • the substrate 54 is a rigid substrate fabricated from epoxy-glass, such that the secondary printed circuit 14 is what is sometimes referred to as a "circuit board".
  • the substrate 54 includes only a single layer.
  • the substrate 54 may include any number of layers greater than one layer.
  • the substrate 54 may include two exterior layers that each defines one of the sides 62 and 64, with one or more interior layers sandwiched between the exterior layers.
  • Each interior layer of the substrate 54 may include electrical contacts (not shown) and/or electrical traces (not shown) thereon.
  • the electrical contacts and/or electrical traces on interior layers of the substrate 54 may electrically connect some or all of the secondary contacts 70 and/or secondary traces 72 to any location on or within the substrate 54 (such as, but not limited to, any location on any layer, including the same layer, of the substrate 54).
  • One or more layers of the substrate 54 is optionally a ground plane.
  • the substrate 54 may be referred to herein as a "secondary substrate".
  • the substrate 54 may include one or more electrical components (not shown) thereon.
  • Each of the electrical components may be active or passive. Examples of active electrical components include, but are not limited to, processors, amplifiers, and/or the like. Examples of passive electrical components include, but are not limited to, resistors, capacitors, inductors, diodes, and/or the like.
  • Each of the electrical components may be electrically connected to one or more of the secondary contacts 70 and/or the secondary traces 72.
  • Each secondary printed circuit 14 mounted on the base printed circuit 12 may have any height H. In some embodiments, the height H of one or more secondary printed circuits 14 is different than the height H of one or more other secondary printed circuits 14 mounted on the base printed circuit 12.
  • the mating edge 46 of each secondary printed circuit 14 mounted on the base printed circuit 12 may also have any thickness T for being received within any width W ( Figure 6) of the corresponding slot 36. In some embodiments, the thickness T of the mating edge 46 of one or more secondary printed circuits 14 is different than the thickness T of the mating edge 46 of one or more other secondary printed circuits 14 mounted on the base printed circuit 12.
  • Figure 9 is an enlarged perspective view of a portion of the printed circuit assembly 10 shown in Figure 1.
  • the substrate 54 of the secondary printed circuit 14 is directly engaged with the substrate 16 of the base printed circuit 12 at the printed circuit receiving area 29 of the base printed circuit 12.
  • the mating edge 46 of the secondary printed circuit 14 is inserted into the corresponding slot 36 within the base printed circuit 12.
  • the mating edge 46 of the secondary printed circuit 14 thereby directly engages the base printed circuit 12 at the bottom 40 ( Figure 6) and/or the side walls 37 and/or 39 ( Figure 6) of the corresponding slot 36.
  • the slots 36 facilitate mechanically stabilizing the secondary printed circuit 14 relative to the base printed circuit 12.
  • Each secondary contact 70 of the secondary printed circuit 14 is electrically connected to the corresponding electrical contact(s) 30 of the base printed circuit 12 using an electrical bonding material 78.
  • the secondary ground contact 73 of the secondary printed circuit 14 is electrically connected to corresponding ones of the electrical contacts 30 using the electrical bonding material 78.
  • the electrical bonding material 78 may be any material that establishes an electrical connection between the secondary contacts 70 and the corresponding electrical contacts 30 and 70 and between the secondary ground contact 73 and the corresponding electrical contacts 30, such as, but not limited to, solder, electrically conductive epoxy, wire bonding, electrically conductive adhesive, welding material, and/or the like.
  • the secondary printed circuit 14 is mounted on, including being electrically connected to, the base printed circuit 12 without the use of an intervening electrical connector assembly (not shown).
  • the secondary printed circuit 14 is mounted on, including being electrically connected to, the base printed circuit 12 without using an intervening electrical connector assembly that includes a housing (not shown) and a plurality of electrical contacts (not shown) that extend between, and electrically connect, the electrical contacts 30 and the secondary contacts 70.
  • the printed circuit assembly 10 may include any other structure, means, and/or the like that facilitates mechanically holding, stabilizing, connecting, mounting, attaching, and/or the like the secondary printed circuits 14 on the base printed circuit 12, such as, but not limited to, potting, combs, other mechanical elements (such as, but not limited to, snap connections, interference connections, locks, latches, and/or the like), and/or the like.
  • the side 22 of the base printed circuit 12 includes the secondary printed circuits 14 mounted thereon.
  • the side 24 of the base printed circuit 12 includes one or more secondary printed circuits 12 mounted thereon, including being electrically connected to one or more of the electrical contacts 32 on the side 24 (such as, but not limited to, via the electrical bonding material 78).
  • the height H of each of the secondary printed circuits 14 is approximately the same and the depth D ( Figure 6) of each of the slots 36 is approximately the same.
  • the height H of one or more of the secondary printed circuits 14 is different than the height H of one or more other secondary printed circuits 14 and/or the depth D of one or more of the slots 36 is different than one or more other slots 36. Varying the height H of the secondary printed circuits 14 relative to each other and/or varying the depth D of the slots relative to each other may enable easier access to the electrical conductors 76 of the electrical leads 74 and the secondary traces 72 (for electrical connection therebetween) even after one or more of the secondary printed circuits 14 has been electrically connected to the base printed circuit 12.
  • one or more of the secondary printed circuits 14 is electrically connected to one or more other secondary printed circuits 14 via the base printed circuit 12.
  • the base printed circuit 12 provides a common ground plane for two or more of the secondary printed circuits 14.
  • one or more of the secondary printed circuits 14 may provide a signal and/or power input to the base printed circuit 12 while one or more other secondary printed circuits 14 provides an associated signal and/or power output from the base printed circuit 12.
  • one or more of the secondary printed circuits 14 is mounted on, including being electrically connected to, more than one base printed circuit 12.
  • one or more of the secondary printed circuits 14 in addition to being mounted on the base printed circuit 12 at the mating edge 46 as shown, one or more of the secondary printed circuits 14 is mounted on, including being electrically connected to, another base printed circuit 12 at the cable-receiving edge 60.
  • the mating edge 46 of one or more of the secondary printed circuits 14 may be mounted on, including being electrically connected to, one or more other base printed circuits 12 in addition to the base printed circuit 12 shown (such as, but not limited to, two or more base printed circuits 12 arranged generally in the same plane as each other).
  • the height H ( Figures 7 and 8) of each of the secondary printed circuits 14 extends approximately perpendicular relative to the central plane 48 ( Figure 6) of the substrate 16. Accordingly, in the exemplary embodiment the height H of each of the secondary printed circuits 14 extend approximately parallel to each other. In alternative embodiments, the height H of each secondary printed circuit 14 may extend at any other non-parallel angle relative to the central plane 48. In some embodiments, the height H of one or more secondary printed circuits 14 extends at a different angle relative to the central plane 48 of the base printed circuit 12 than the height H of one or more other secondary printed circuits 14 that are mounted on the base printed circuit 12.
  • FIG 10 is an elevational view of an exemplary alternative embodiment of a printed circuit assembly 110.
  • the printed circuit assembly 110 includes a base printed circuit 112 and a plurality of secondary printed circuits 114. Each of the secondary printed circuits 114 is mounted on the base printed circuit 1 12 such that the secondary printed circuit 114 is electrically connected to the base printed circuit 112.
  • the base printed circuit 112 includes a plurality of slots 136 that each receives a mating edge 146 of a corresponding one of the secondary printed circuits 14. Each slot 136 extends into the base printed circuit 12 along a central depth axis 138.
  • the central depth axis 138 of each slot 136 extends at an approximately 45° angle relative to a central plane 148 of the base printed circuit 12.
  • a height Hi of each of the secondary printed circuits 114 extends at an approximately 45° angle relative to the central plane 148 of the base printed circuit 112.
  • the height H] of each of the secondary printed circuits 114 extend approximately parallel to each other. Tilting the secondary printed circuits 114 such that the height Hj of each of the secondary printed circuits 114 extends at a non-parallel and non-perpendicular angle relative to the central plane 148 of the base printed circuit 112 may facilitate reducing an overall height H 2 of the printed circuit assembly 110.
  • the central depth axis 138 of each slot 136 may extend at any other non-parallel and non-perpendicular angle relative to the central plane 148 such that the height Hi of each of the secondary printed circuits 1 14 extends at any other non- parallel and non-perpendicular angle relative to the central plane 148.
  • the central depth axis 138 of one or more slots 136 extends at a different angle relative to the central plane 148 of the base printed circuit 112 than the central depth axis 138 of one or more other slots 136.
  • the height Hi of one or more of the secondary printed circuits 1 14 extends at a different angle relative to the central plane 148 of the base printed circuit 112 than the height Hi of one or more other secondary printed circuits 1 14.
  • FIG 11 is a perspective view of another exemplary alternative embodiment of a printed circuit assembly 210.
  • the printed circuit assembly 210 includes a base printed circuit 212 and a plurality of secondary printed circuits 214. Each of the secondary printed circuits 214 is mounted on the base printed circuit 212 such that the secondary printed circuit 214 is electrically connected to the base printed circuit 212.
  • the base printed circuit 212 includes a substrate 216 having a side 222 that includes an exterior surface 226. A plurality of electrical contacts 230 extend on the exterior surface 226.
  • Each secondary printed circuit 214 includes a mating edge 246 having a plurality of secondary contacts 270 arranged therealong.
  • the base printed circuit 212 does not include any slots similar to the slots 36 ( Figures 1-3, 5, 6, and 9) or 136 ( Figure 10). Rather, the mating edge 246 of each secondary printed circuit 214 directly engages the exterior surface 226 of the base printed circuit 212.
  • Each secondary contact 270 of the secondary printed circuits 214 is electrically connected to the corresponding electrical contact 230 of the base printed circuit 212 via an electrical bonding material 278.
  • the electrical bonding material 278 may facilitate providing mechanical stability between the base printed circuit 212 and the secondary printed circuits 214.
  • FIG 12 is a perspective view of another exemplary alternative embodiment of a printed circuit assembly 310.
  • the printed circuit assembly 310 includes a base printed circuit 312 and a plurality of secondary printed circuits 314.
  • Each of the secondary printed circuits 314 is mounted on the base printed circuit 312 such that the secondary printed circuit 314 is electrically connected to the base printed circuit 312.
  • the base printed circuit 312 includes a substrate 316 having a side 322 that includes an exterior surface 326.
  • a plurality of electrical contacts 330 extend on the exterior surface 326.
  • Each secondary printed circuit 314 includes a mating edge 346 having a plurality of secondary contacts 370 arranged therealong.
  • Each secondary contact 370 of the secondary printed circuits 314 directly engages the corresponding electrical contact(s) 330 of the base printed circuit 312 to establish an electrical connection therebetween.
  • FIG. 13 is an elevational view of another exemplary alternative embodiment of a printed circuit assembly 410.
  • the printed circuit assembly 410 includes a base printed circuit 412 and a plurality of secondary printed circuits 414. Each of the secondary printed circuits 414 is mounted on the base printed circuit 412 such that the secondary printed circuit 414 is electrically connected to the base printed circuit 412.
  • a side 462 of each of the secondary printed circuits 414 includes one or more secondary contacts 470 and/or one or more secondary traces 472 that are each electrically connected to corresponding electrical contacts 430 on the base printed circuit 412 (such as, but not limited to, via electrical bonding material 478).
  • an opposite side 464 of one or more of the secondary printed circuits 414 includes one or more secondary contacts 470 and/or one or more secondary traces 472, wherein some or all of the secondary contacts 470 and/or the secondary traces 472 on the side 464 are electrically connected to corresponding electrical contacts 430 on the base printed circuit 412 (such as, but not limited to, via the electrical bonding material 478).
  • the embodiments described and/or illustrated herein may enable an increase of the density of electrical contacts at the interconnection between printed circuits without decreasing signal integrity.
  • the embodiments described and/or illustrated herein may provide connection of a printed circuit that terminates an increased number of electrical leads and/or coaxial cables to another printed circuit without decreasing signal integrity.
  • the embodiments described and/or illustrated herein may facilitate adding functionality (such as, but not limited to, passive and/or active electrical components, and/or the like) to a printed circuit without decreasing signal integrity and/or may facilitate increasing a density and/or a number of electrical contacts on a printed circuit without decreasing signal integrity.
  • the embodiments described and/or illustrated herein may facilitate eliminating an intervening electrical connector assembly, which may free up space on the printed circuit that would otherwise be occupied by the electrical connector assembly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Combinations Of Printed Boards (AREA)
EP10704613A 2009-02-02 2010-02-01 Printed circuit assembly Withdrawn EP2392200A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/364,333 US7972143B2 (en) 2009-02-02 2009-02-02 Printed circuit assembly
PCT/US2010/000277 WO2010087996A1 (en) 2009-02-02 2010-02-01 Printed circuit assembly

Publications (1)

Publication Number Publication Date
EP2392200A1 true EP2392200A1 (en) 2011-12-07

Family

ID=42169463

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10704613A Withdrawn EP2392200A1 (en) 2009-02-02 2010-02-01 Printed circuit assembly

Country Status (6)

Country Link
US (1) US7972143B2 (ko)
EP (1) EP2392200A1 (ko)
JP (1) JP2012517100A (ko)
KR (1) KR20110122159A (ko)
CN (1) CN102301842A (ko)
WO (1) WO2010087996A1 (ko)

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Also Published As

Publication number Publication date
WO2010087996A1 (en) 2010-08-05
US20100197150A1 (en) 2010-08-05
US7972143B2 (en) 2011-07-05
JP2012517100A (ja) 2012-07-26
CN102301842A (zh) 2011-12-28
KR20110122159A (ko) 2011-11-09

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